======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '133'
                                          'artist'  'Bill Haley and his Comets'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Teenager's Mother"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-2', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['rockabilly', 'rock and roll', 'rock n roll', 'oldies', '50s']"
                                     'discogstags'  "['rock & roll', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1956'
                                        'comments'  ''
                                           'genre'  'rock-pop-early-rocknroll'
                                             'bpm'  '114.738'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

'TBPM' (BPM (beats per minute))                     '114.738'
'TCON' (Content type, a.k.a. Genre)                 'rock-pop-early-rocknroll'
'TDRC' (Recording time)                             '1956'
'TIT2' (Title/songname/content description)         "Teenager's Mother"
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Bill Haley and his Comets'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock & roll', 'rock']
'TXXX:lastfmtags'                                   ['rockabilly', 'rock and roll', 'rock n roll', 'oldies', '50s']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.53 dB'
'TXXX:replaygain_track_peak'                        '0.667111'

========================== row from database ==========================
                                              'id'  1507025
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1956/Bill Haley and his Comets - Teenager_s Mother 25-8-1956.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  133
                                           'genre'  rock-pop-early-rocknroll
                                        'filesize'  2668338
                                           'mtime'  1622659466
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1956 Teenager_s 25 8 1956 rock pop early rocknroll
                                      'tag_artist'  Bill Haley and his Comets
                                     'tag_release'  None
                                       'tag_title'  Teenager's Mother
                                             'bpm'  114.738
                                    'search_title'  'mother':4 's':2 'teenager':1 'teenagers':3
                                   'search_artist'  'and':3 'bill':1 'comets':5 'haley':2 'his':4
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1956':6 '25':9 '8':10 'country':4 'early':13 'exotica':2 'jazz':1 'oldies':3 'pop':12 'rock':11 'rocknroll':14 's':8 'teenager':7
                                    'search_combo'  '00oldiepop':14 '1956':15 '25':18 '8':19 'and':7B 'bill':5B 'comets':9B 'country':13 'early':22 'exotica':11 'haley':6B 'his':8B 'jazz':10 'mother':4A 'oldies':12 'pop':21 'rock':20 'rocknroll':23 's':2A,17 'teenager':1A,16 'teenagers':3A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['rockabilly', 'rock and roll', 'rock n roll', 'oldies', '50s']
                                        'tag_date'  1956
                                     'discogstags'  ['rock & roll', 'rock']

============================== file details ==============================
                                           'mtime'  1622659465.5131216  (2021-06-02 20:44:25)
                             'size'  2668338